mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-26 20:09:02 +09:00
![]() The functions to detect the state of the ready / busy signal is already available but only used in the SPL case. Lets use it always, also for the main U-Boot. As all boards should have this HW connection. Testing on Siemens Draco (am335x) showed a small perfomance gain by using this ready pin to detect the NAND chip state. Here the values tested on Draco with Hynix 4GBit NAND: Without NAND ready pin: U-Boot# time nand read 80400000 0 400000 NAND read: device 0 offset 0x0, size 0x400000 4194304 bytes read: OK time: 2.947 seconds, 2947 ticks With NAND ready pin: U-Boot# time nand read 80400000 0 400000 NAND read: device 0 offset 0x0, size 0x400000 4194304 bytes read: OK time: 2.795 seconds, 2795 ticks So an increase of approx. 5%. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Tom Rini <trini@ti.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Roger Meier <r.meier@siemens.com> Cc: Samuel Egli <samuel.egli@siemens.com> |
||
---|---|---|
.. | ||
nand | ||
onenand | ||
spi | ||
ubi | ||
at45.c | ||
cfi_flash.c | ||
cfi_mtd.c | ||
dataflash.c | ||
ftsmc020.c | ||
jedec_flash.c | ||
Kconfig | ||
Makefile | ||
mtdconcat.c | ||
mtdcore.c | ||
mtdcore.h | ||
mtdpart.c | ||
mw_eeprom.c | ||
st_smi.c |